<script setup lang="ts">
import { onMounted, ref, watch } from 'vue';

const props = defineProps<{
    ex: string;
}>();

const dayRule = ref('');
const dayRuleSup = ref<any>('');
const dateArr = ref<any[]>([]);
const resultList = ref<string[]>([]);
const isShow = ref(false);

// 表达式值变化时，开始去计算结果
const expressionChange = () => {
    // 计算开始-隐藏结果
    isShow.value = false;
    // 获取规则数组[0秒、1分、2时、3日、4月、5星期、6年]
    const ruleArr = props.ex.split(' ');
    // 用于记录进入循环的次数
    let nums = 0;
    // 用于暂时存符号时间规则结果的数组
    const resultArr: string[] = [];
    // 获取当前时间精确至[年、月、日、时、分、秒]
    const nTime = new Date();
    const nYear = nTime.getFullYear();
    let nMonth = nTime.getMonth() + 1;
    let nDay = nTime.getDate();
    let nHour = nTime.getHours();
    let nMin = nTime.getMinutes();
    let nSecond = nTime.getSeconds();
    // 根据规则获取到近100年可能年数组、月数组等等
    getSecondArr(ruleArr[0]);
    getMinArr(ruleArr[1]);
    getHourArr(ruleArr[2]);
    getDayArr(ruleArr[3]);
    getMonthArr(ruleArr[4]);
    getWeekArr(ruleArr[5]);
    getYearArr(ruleArr[6], nYear);
    // 将获取到的数组赋值-方便使用
    const sDate = dateArr.value[0];
    const mDate = dateArr.value[1];
    const hDate = dateArr.value[2];
    const DDate = dateArr.value[3];
    const MDate = dateArr.value[4];
    const YDate = dateArr.value[5];
    // 获取当前时间在数组中的索引
    let sIdx = getIndex(sDate, nSecond);
    let mIdx = getIndex(mDate, nMin);
    let hIdx = getIndex(hDate, nHour);
    let DIdx = getIndex(DDate, nDay);
    let MIdx = getIndex(MDate, nMonth);
    const YIdx = getIndex(YDate, nYear);
    // 重置月日时分秒的函数(后面用的比较多)
    const resetSecond = function () {
        sIdx = 0;
        nSecond = sDate[sIdx];
    };
    const resetMin = function () {
        mIdx = 0;
        nMin = mDate[mIdx];
        resetSecond();
    };
    const resetHour = function () {
        hIdx = 0;
        nHour = hDate[hIdx];
        resetMin();
    };
    const resetDay = function () {
        DIdx = 0;
        nDay = DDate[DIdx];
        resetHour();
    };
    const resetMonth = function () {
        MIdx = 0;
        nMonth = MDate[MIdx];
        resetDay();
    };
    // 如果当前年份不为数组中当前值
    if (nYear !== YDate[YIdx]) {
        resetMonth();
    }
    // 如果当前月份不为数组中当前值
    if (nMonth !== MDate[MIdx]) {
        resetDay();
    }
    // 如果当前"日"不为数组中当前值
    if (nDay !== DDate[DIdx]) {
        resetHour();
    }
    // 如果当前"时"不为数组中当前值
    if (nHour !== hDate[hIdx]) {
        resetMin();
    }
    // 如果当前"分"不为数组中当前值
    if (nMin !== mDate[mIdx]) {
        resetSecond();
    }

    // 循环年份数组
    goYear: for (let Yi = YIdx; Yi < YDate.length; Yi++) {
        const YY = YDate[Yi];
        // 如果到达最大值时
        if (nMonth > MDate[MDate.length - 1]) {
            resetMonth();
            continue;
        }
        // 循环月份数组
        goMonth: for (let Mi = MIdx; Mi < MDate.length; Mi++) {
            // 赋值、方便后面运算
            let MM = MDate[Mi];
            MM = MM < 10 ? `0${MM}` : MM;
            // 如果到达最大值时
            if (nDay > DDate[DDate.length - 1]) {
                resetDay();
                if (Mi === MDate.length - 1) {
                    resetMonth();
                    continue goYear;
                }
                continue;
            }
            // 循环日期数组
            goDay: for (let Di = DIdx; Di < DDate.length; Di++) {
                // 赋值、方便后面运算
                let DD = DDate[Di];
                let thisDD = DD < 10 ? `0${DD}` : DD;

                // 如果到达最大值时
                if (nHour > hDate[hDate.length - 1]) {
                    resetHour();
                    if (Di === DDate.length - 1) {
                        resetDay();
                        if (Mi === MDate.length - 1) {
                            resetMonth();
                            continue goYear;
                        }
                        continue goMonth;
                    }
                    continue;
                }

                // 判断日期的合法性，不合法的话也是跳出当前循环
                if (!checkDate(`${YY}-${MM}-${thisDD} 00:00:00`) && dayRule.value !== 'workDay' && dayRule.value !== 'lastWeek' && dayRule.value !== 'lastDay') {
                    resetDay();
                    continue goMonth;
                }
                // 如果日期规则中有值时
                switch (dayRule.value) {
                    case 'assWeek': {
                        // 如果指定了是第几周的星期几
                        // 获取每月1号是属于星期几
                        const thisWeek = formatDate(new Date(`${YY}-${MM}-${DD} 00:00:00`), 'week');
                        DD = (dayRuleSup.value as number[])[1] >= thisWeek ? (dayRuleSup.value as number[])[0] * 7 + (dayRuleSup.value as number[])[1] - thisWeek + 1 : (dayRuleSup.value as number[])[0] * 7 + (dayRuleSup.value as number[])[1] - thisWeek + 1;

                        break;
                    }
                    case 'lastDay': {
                        // 如果不是合法日期则需要将前将日期调到合法日期即月末最后一天
                        if (!checkDate(`${YY}-${MM}-${thisDD} 00:00:00`)) {
                            while (DD > 0 && !checkDate(`${YY}-${MM}-${thisDD} 00:00:00`)) {
                                DD--;
                                thisDD = DD < 10 ? `0${DD}` : DD;
                            }
                        }
                        break;
                    }
                    case 'lastWeek': {
                        // 如果指定了每月最后一个星期几
                        // 校验并调整如果是2月30号这种日期传进来时需调整至正常月底
                        if (!checkDate(`${YY}-${MM}-${thisDD} 00:00:00`)) {
                            while (DD > 0 && !checkDate(`${YY}-${MM}-${thisDD} 00:00:00`)) {
                                DD--;
                                thisDD = DD < 10 ? `0${DD}` : DD;
                            }
                        }
                        // 获取月末最后一天是星期几
                        const thisWeek = formatDate(new Date(`${YY}-${MM}-${thisDD} 00:00:00`), 'week');
                        // 找到要求中最近的那个星期几
                        if ((dayRuleSup.value as number) < thisWeek) {
                            DD -= thisWeek - (dayRuleSup.value as number);
                        } else if ((dayRuleSup.value as number) > thisWeek) {
                            DD -= 7 - ((dayRuleSup.value as number) - thisWeek);
                        }

                        break;
                    }
                    case 'weekDay': {
                        // 如果指定了是星期几
                        // 获取当前日期是属于星期几
                        const thisWeek = formatDate(new Date(`${YY}-${MM}-${DD} 00:00:00`), 'week');
                        // 校验当前星期是否在星期池（dayRuleSup）中
                        if (!(dayRuleSup.value as number[]).indexOf(thisWeek) < 0) {
                            // 如果到达最大值时
                            if (Di === DDate.length - 1) {
                                resetDay();
                                if (Mi === MDate.length - 1) {
                                    resetMonth();
                                    continue goYear;
                                }
                                continue goMonth;
                            }
                            continue;
                        }
                    break;
                    }
                    case 'workDay': {
                        // 校验并调整如果是2月30号这种日期传进来时需调整至正常月底
                        if (!checkDate(`${YY}-${MM}-${thisDD} 00:00:00`)) {
                            while (DD > 0 && !checkDate(`${YY}-${MM}-${thisDD} 00:00:00`)) {
                                DD--;
                                thisDD = DD < 10 ? `0${DD}` : DD;
                            }
                        }
                        // 获取达到条件的日期是星期X
                        const thisWeek = formatDate(new Date(`${YY}-${MM}-${thisDD} 00:00:00`), 'week');
                        // 当星期日时
                        if (thisWeek === 1) {
                            // 先找下一个日，并判断是否为月底
                            DD++;
                            thisDD = DD < 10 ? `0${DD}` : DD;
                            // 判断下一日已经不是合法日期
                            if (!checkDate(`${YY}-${MM}-${thisDD} 00:00:00`)) {
                                DD -= 3;
                            }
                        } else if (thisWeek === 7) {
                            // 当星期6时只需判断不是1号就可进行操作
                            if (dayRuleSup.value === '1') {
                                DD += 2;
                            } else {
                                DD--;
                            }
                        }
                        break;
                    }
                    // No default
                }
                // 判断时间值是否小于10置换成"05"这种格式
                DD = DD < 10 ? `0${DD}` : DD;

                // 循环"时"数组
                goHour: for (let hi = hIdx; hi < hDate.length; hi++) {
                    const hh = hDate[hi] < 10 ? `0${hDate[hi]}` : hDate[hi];

                    // 如果到达最大值时
                    if (nMin > mDate[mDate.length - 1]) {
                        resetMin();
                        if (hi === hDate.length - 1) {
                            resetHour();
                            if (Di === DDate.length - 1) {
                                resetDay();
                                if (Mi === MDate.length - 1) {
                                    resetMonth();
                                    continue goYear;
                                }
                                continue goMonth;
                            }
                            continue goDay;
                        }
                        continue;
                    }
                    // 循环"分"数组
                    goMin: for (let mi = mIdx; mi < mDate.length; mi++) {
                        const mm = mDate[mi] < 10 ? `0${mDate[mi]}` : mDate[mi];

                        // 如果到达最大值时
                        if (nSecond > sDate[sDate.length - 1]) {
                            resetSecond();
                            if (mi === mDate.length - 1) {
                                resetMin();
                                if (hi === hDate.length - 1) {
                                    resetHour();
                                    if (Di === DDate.length - 1) {
                                        resetDay();
                                        if (Mi === MDate.length - 1) {
                                            resetMonth();
                                            continue goYear;
                                        }
                                        continue goMonth;
                                    }
                                    continue goDay;
                                }
                                continue goHour;
                            }
                            continue;
                        }
                        // 循环"秒"数组
                        for (let si = sIdx; si <= sDate.length - 1; si++) {
                            const ss = sDate[si] < 10 ? `0${sDate[si]}` : sDate[si];
                            // 添加当前时间（时间合法性在日期循环时已经判断）
                            if (MM !== '00' && DD !== '00') {
                                resultArr.push(`${YY}-${MM}-${DD} ${hh}:${mm}:${ss}`);
                                nums++;
                            }
                            // 如果条数满了就退出循环
                            if (nums === 60) break goYear;
                            // 如果到达最大值时
                            if (si === sDate.length - 1) {
                                resetSecond();
                                if (mi === mDate.length - 1) {
                                    resetMin();
                                    if (hi === hDate.length - 1) {
                                        resetHour();
                                        if (Di === DDate.length - 1) {
                                            resetDay();
                                            if (Mi === MDate.length - 1) {
                                                resetMonth();
                                                continue goYear;
                                            }
                                            continue goMonth;
                                        }
                                        continue goDay;
                                    }
                                    continue goHour;
                                }
                                continue goMin;
                            }
                        } // goSecond
                    } // goMin
                } // goHour
            } // goDay
        } // goMonth
    }
    // 判断100年内的结果条数
    if (resultArr.length === 0) {
        resultList.value = ['没有达到条件的结果！'];
    } else {
        resultList.value = resultArr;
        if (resultArr.length !== 60) {
            resultList.value.push(`最近100年内只有上面${resultArr.length}条结果！`);
        }
    }
    // 计算完成-显示结果
    isShow.value = true;
};

// 用于计算某位数字在数组中的索引
const getIndex = (arr: number[], value: number) => {
    if (value <= arr[0]!! || value > arr[arr.length - 1]!!) {
        return 0;
    } else {
        for (let i = 0; i < arr.length - 1; i++) {
            if (value > arr[i]!! && value <= arr[i + 1]!!) {
                return i + 1;
            }
        }
    }
    return 0; // 添加默认返回值
};

// 获取"年"数组
const getYearArr = (rule: string | undefined, year: number) => {
    dateArr.value[5] = getOrderArr(year, year + 100);
    if (rule !== undefined) {
        if (rule.includes('-')) {
            dateArr.value[5] = getCycleArr(rule, year + 100, false);
        } else if (rule.includes('/')) {
            dateArr.value[5] = getAverageArr(rule, year + 100);
        } else if (rule !== '*') {
            dateArr.value[5] = getAssignArr(rule);
        }
    }
};

// 获取"月"数组
const getMonthArr = (rule?: string) => {
    dateArr.value[4] = getOrderArr(1, 12);
    if (rule?.includes('-')) {
        dateArr.value[4] = getCycleArr(rule, 12, false);
    } else if (rule?.includes('/')) {
        dateArr.value[4] = getAverageArr(rule, 12);
    } else if (rule !== '*') {
        dateArr.value[4] = getAssignArr(rule);
    }
};

// 获取"日"数组-主要为日期规则
const getWeekArr = (rule?: string) => {
    // 只有当日期规则的两个值均为""时则表达日期是有选项的
    if (dayRule.value === '' && dayRuleSup.value === '') {
        if (rule?.includes('-')) {
            dayRule.value = 'weekDay';
            dayRuleSup.value = getCycleArr(rule, 7, false);
        } else if (rule?.includes('#')) {
            dayRule.value = 'assWeek';
            const matchRule = rule.match(/\d/g);
            if (matchRule) {
                dayRuleSup.value = [Number(matchRule[1]), Number(matchRule[0])];
                dateArr.value[3] = [1];
                if ((dayRuleSup.value as number[])[1] === 7) {
                    (dayRuleSup.value as number[])[1] = 0;
                }
            }
        } else if (rule?.includes('L')) {
            dayRule.value = 'lastWeek';
            const matchRule = rule.match(/\d{1,2}/g);
            if (matchRule) {
                dayRuleSup.value = Number(matchRule[0]);
                dateArr.value[3] = [31];
                if (dayRuleSup.value === 7) {
                    dayRuleSup.value = 0;
                }
            }
        } else if (rule !== '*' && rule !== '?') {
            dayRule.value = 'weekDay';
            dayRuleSup.value = getAssignArr(rule);
        }
    }
};

// 获取"日"数组-少量为日期规则
const getDayArr = (rule?: string) => {
    dateArr.value[3] = getOrderArr(1, 31);
    dayRule.value = '';
    dayRuleSup.value = '';
    if (rule?.includes('-')) {
        dateArr.value[3] = getCycleArr(rule, 31, false);
        dayRuleSup.value = 'null';
    } else if (rule?.includes('/')) {
        dateArr.value[3] = getAverageArr(rule, 31);
        dayRuleSup.value = 'null';
    } else if (rule?.includes('W')) {
        dayRule.value = 'workDay';
        const matchRule = rule.match(/\d{1,2}/g);
        if (matchRule) {
            dayRuleSup.value = matchRule[0];
            dateArr.value[3] = [Number(dayRuleSup.value)];
        }
    } else if (rule?.includes('L')) {
        dayRule.value = 'lastDay';
        dayRuleSup.value = 'null';
        dateArr.value[3] = [31];
    } else if (rule !== '*' && rule !== '?') {
        dateArr.value[3] = getAssignArr(rule);
        dayRuleSup.value = 'null';
    } else if (rule === '*') {
        dayRuleSup.value = 'null';
    }
};

// 获取"时"数组
const getHourArr = (rule?: string) => {
    dateArr.value[2] = getOrderArr(0, 23);
    if (rule?.includes('-')) {
        dateArr.value[2] = getCycleArr(rule, 24, true);
    } else if (rule?.includes('/')) {
        dateArr.value[2] = getAverageArr(rule, 23);
    } else if (rule !== '*') {
        dateArr.value[2] = getAssignArr(rule);
    }
};

// 获取"分"数组
const getMinArr = (rule?: string) => {
    dateArr.value[1] = getOrderArr(0, 59);
    if (rule?.includes('-')) {
        dateArr.value[1] = getCycleArr(rule, 60, true);
    } else if (rule?.includes('/')) {
        dateArr.value[1] = getAverageArr(rule, 59);
    } else if (rule !== '*') {
        dateArr.value[1] = getAssignArr(rule);
    }
};

// 获取"秒"数组
const getSecondArr = (rule?: string) => {
    dateArr.value[0] = getOrderArr(0, 59);
    if (rule?.includes('-')) {
        dateArr.value[0] = getCycleArr(rule, 60, true);
    } else if (rule?.includes('/')) {
        dateArr.value[0] = getAverageArr(rule, 59);
    } else if (rule !== '*') {
        dateArr.value[0] = getAssignArr(rule);
    }
};

// 根据传进来的min-max返回一个顺序的数组
const getOrderArr = (min: number, max: number) => {
    const arr = [];
    for (let i = min; i <= max; i++) {
        arr.push(i);
    }
    return arr;
};

// 根据规则中指定的零散值返回一个数组
const getAssignArr = (rule?: string) => {
    const arr: number[] = [];
    const assiginArr = rule?.split(',');
    if (assiginArr) {
        for (const [i, element] of assiginArr.entries()) {
            arr[i] = Number(element);
        }
    }
    arr.sort(compare);
    return arr;
};

// 根据一定算术规则计算返回一个数组
const getAverageArr = (rule: string, limit: number) => {
    const arr: number[] = [];
    const agArr = rule.split('/');
    let min = Number(agArr[0]);
    const step = Number(agArr[1]);
    while (min <= limit) {
        arr.push(min);
        min += step;
    }
    return arr;
};

// 根据规则返回一个具有周期性的数组
const getCycleArr = (rule: string, limit: number, status: boolean) => {
    // status--表示是否从0开始（则从1开始）
    const arr: number[] = [];
    const cycleArr = rule.split('-');
    const min = Number(cycleArr[0]);
    let max = Number(cycleArr[1]);
    if (min > max) {
        max += limit;
    }
    for (let i = min; i <= max; i++) {
        let add = 0;
        if (!status && i % limit === 0) {
            add = limit;
        }
        arr.push(Math.round((i % limit) + add));
    }
    arr.sort(compare);
    return arr;
};

// 比较数字大小（用于Array.sort）
const compare = (value1: number, value2: number) => {
    return value2 - value1 > 0 ? -1 : 1;
};

// 格式化日期格式如：2017-9-19 18:04:33
const formatDate = (value: Date | number, type?: string) => {
    // 计算日期相关值
    const time = typeof value === 'number' ? new Date(value) : value;
    const Y = time.getFullYear();
    const M = time.getMonth() + 1;
    const D = time.getDate();
    const h = time.getHours();
    const m = time.getMinutes();
    const s = time.getSeconds();
    const week = time.getDay();
    // 如果传递了type的话
    if (type === undefined) {
        return `${Y}-${M < 10 ? `0${M}` : M}-${D < 10 ? `0${D}` : D} ${h < 10 ? `0${h}` : h}:${m < 10 ? `0${m}` : m}:${s < 10 ? `0${s}` : s}`;
    } else if (type === 'week') {
        // 在quartz中 1为星期日
        return week + 1;
    }
    return '';
};

// 检查日期是否存在
const checkDate = (value: string) => {
    const time = new Date(value);
    const format = formatDate(time);
    return value === format;
};

watch(
    () => props.ex,
    () => {
        expressionChange();
    },
);

onMounted(() => {
    // 初始化 获取一次结果
    expressionChange();
});
</script>

<template>
    <div class="popup-result">
        <p class="title">最近{{ resultList.length }}次运行时间</p>
        <ul class="popup-result-scroll">
            <template v-if="isShow">
                <li v-for="item in resultList" :key="item">{{ item }}</li>
            </template>
            <li v-else>计算结果中...</li>
        </ul>
    </div>
</template>

<style scoped>
.popup-result {
    box-sizing: border-box;
    line-height: 24px;
    margin: 25px auto;
    padding: 15px 10px 10px;
    border: 1px solid #ccc;
    position: relative;
}

.popup-result .title {
    position: absolute;
    top: -28px;
    left: 50%;
    width: 140px;
    font-size: 14px;
    margin-left: -70px;
    text-align: center;
    line-height: 30px;
    background: #fff;
}

.popup-result-scroll {
    font-size: 12px;
    line-height: 24px;
    height: 10em;
    overflow-y: auto;
}
</style>

<style scoped>
.popup-result {
    box-sizing: border-box;
    line-height: 24px;
    margin: 25px auto;
    padding: 15px 10px 10px;
    border: 1px solid #ccc;
    position: relative;
}

.popup-result .title {
    position: absolute;
    top: -28px;
    left: 50%;
    width: 140px;
    font-size: 14px;
    margin-left: -70px;
    text-align: center;
    line-height: 30px;
    background: #fff;
}

.popup-result-scroll {
    font-size: 12px;
    line-height: 24px;
    height: 10em;
    overflow-y: auto;
}
</style>
